Analysis of birth records shows that in 2002 almost one in four births in the United States was to an

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1 Backgrounder July 2005 Births to Immigrants in America, 1970 to 2002 By Steven A. Camarota Analysis of birth records shows that in 2002 almost one in four births in the United States was to an immigrant mother, legal and illegal, the highest level in American history. The enormous number and proportion of children from immigrant families may overwhelm the assimilation process, making it difficult to integrate these new secondgeneration Americans. At present, the U.S. government automatically gives American citizenship to all people born in the country, even the children of tourists and illegal aliens. 1 Among the study s findings: In 2002, 23 percent of all births in the United States were to immigrant mothers (legal or illegal), compared to 15 percent in 1990, 9 percent in 1980, and 6 percent in Even at the peak of the last great wave of immigration in 1910, births to immigrant mothers accounted for a slightly smaller share than today. After 1910 immigration was reduced, but current immigration continues at record levels, thus births to immigrants will continue to increase. Our best estimate is that 383,000 or 42 percent of births to immigrants are to illegal alien mothers. Births to illegals now account for nearly one out of every 10 births in the United States. The large number of births to illegals shows that the longer illegal immigration is allowed to persist, the harder the problem is to solve. Because as U.S. citizens these children can stay permanently, their citizenship can prevent a parent s deportation, and once adults they can sponsor their parents for permanent residence. The large number of children born to illegals also shows that a temporary worker program is unrealistic because it would result in hundreds of thousands of permanent additions to the U.S. population each year, exactly what such a program is supposed to avoid. Overall, immigrant mothers are much less educated than native mothers. In 2002, 39 percent of immigrant mothers lacked a high school education, compared to 17 percent of native mothers. And immigrants now account for 41 percent of births to mothers without a high school degree. The dramatic growth in births to immigrants has been accompanied by a decline in diversity. In 1970, the top country for immigrant births Mexico accounted for 24 percent of births to immigrants, by 2002 it was 45 percent. As a share of all births in the country, Mexican immigrants accounted for one in 10 births in No single foreign country has ever accounted for such a large share of births. Steven Camarota is the Director of Research at the Center 1 for Immigration Studies.

2 In 2002, births to Hispanic immigrants accounted for 59 percent of all births to immigrant mothers. No single cultural/linguistic group has ever accounted for such a large share of births to immigrants. The states with the most dramatic increase in births to immigrants in the last decade are Georgia, North Carolina, Nevada, Nebraska, Arkansas, Arizona, Tennessee, Minnesota, Colorado, Delaware, Virginia, and Maryland Immigrants account for such a large percentage of births because they have somewhat higher fertility and are more likely to be in their reproductive years than natives. However, the difference with natives is not large enough to significantly affect the nation s overall age structure. Immigrants who have arrived in the last two decades plus all of their U.S.born children have only reduced the average age in the United States from 37 to 36 years. Looking at the working age share (15 to 64) of the population also shows little effect from immigration. With or without post1980 immigrants and their U.S.born children, 66 percent of the population is of working age. While immigration has little effect on the nation s age structure, new immigrants (legal and illegal) plus births to immigrants add some 2.3 million people to the nation s population each year, making for a much larger overall population. Introduction It is difficult to imagine a government program that has a more profound impact on society than immigration. Large numbers of immigrants and their descendants cannot help but shape the destiny of the country in which they settle. (The terms immigrant and foreign born are used synonymously in this report.) Even after the original immigrant dies or returns home, his children and descendants will continue to exert a powerful influence on their new country s demographic, political, economic, and cultural life. Examining births to immigrants is therefore important, because it is a way of measuring the scale of immigration and its impact on American society. This is especially true because the U.S. government has chosen to award American citizenship to all persons born in the United States, including those born to temporary visitors or even illegal aliens. As citizens, it seems almost certain that the vast majority of these children will live in America. Why Study Immigrant Births? Public Expenditures on Children. All levels of government provide services to children. Therefore, it is necessary to understand the effect of immigration policy on the number of children being born in the United States in order to better anticipate spending on services, especially public schools. Children from immigrant families may also have needs that are different from those of children from native families. Given the large share of births to immigrants, how these children integrate into American society is critically important to the future of the country. Thus a better understanding of immigration s impact on births is necessary so that government may better meet the needs of these children. Assimilating the Children of Immigrants. There are now more than 30 million immigrants living in the country. It is sometimes suggested that because immigrants are now so numerous it lowers their interaction with natives and reduces their need to integrate fully into American society. Advocates of high immigration often respond that immigrants account for a smaller share of the population today than during the peak of the last great wave of immigration, yet those immigrants integrated successfully. These advocates seem to be saying that the relative sizes of the immigrant and native population matter, but we have not reached the level of the last great wave, so there is little reason to worry. Of course, given the enormous changes in the world, it is not clear that comparing current immigration with that of a century ago makes sense. 2

3 Nor is it clear that the very peak level of immigration, which itself was unusual in American history, is the best point of comparison. Nonetheless, it is true that at the very peak of the last great wave in 1910, the foreign born were a larger share of the total population about 15 percent versus 12 percent today. However, examining births to immigrants is relevant to the assimilation debate because it is another way of measuring the scale of immigration and its impact on American society. Although children born to immigrants are by definition natives, the number and share they represent of all births may have some bearing on how they assimilate. After all, if births to immigrants comprise a very large share of all births, then children from immigrant families may tend to interact primarily with each other, having little contact with the children of natives. As a result, foreign cultural norms, values, and even identities may be dominant among these children. Of course, the fact that a very large share of children may come from immigrant families does not necessarily prove that assimilation will be less complete, since assimilation is a multifaceted and complex process. But the issue of births to immigrants certainly is germane to the debate over the likely course of assimilation. Research on the Second Generation. The changing share of immigrant births is important because it may help us to better understand how things are changing for the children of immigrants. Researchers often examine the assimilation of adults who had immigrant parents, referred to as secondgeneration Americans. But the environment in which such individuals grew up may have fundamentally changed. For example, an American born three decades age to immigrant parents was raised in a country where only about one out of 20 U.S.born children had a foreignborn mother compared to one in four today. The situation for the children of Mexican immigrants is even more striking. In 1970, 54,000 children were born to Mexican immigrant mothers and they accounted for 1.5 percent of all births. In 2002, 408,000 children were born to Mexican immigrant mothers, accounting for 10.1 percent of all births. This change likely will have significant impact on the childhood experience for these children. A person born to immigrants 30 years ago may have grown up with relatively very little contact with other children whose mothers came from the same country. But given the enormous growth in numbers, a child born to an immigrant today may have a very different sense of identity. We at least need to be aware of how things have changed when thinking about the experiences of secondgeneration Americans. Characteristics of Those Having Children. Another reason to examine births to immigrants is that it provides some insight into the environment that the children of immigrants are being born into. For example, data are available on the education level of each child s mother. Education is important because it is the single best indicator of income and overall socioeconomic status. Parental education levels are also a good predictor of how much education the child will ultimately obtain. Thus, examining characteristics such as education provides important clues to the life prospects of these children, and how they may differ from those born to native mothers. Births to Illegal Aliens. Illegal immigration is one of the most contentious issues of our time. The debate involves many complex topics that go well beyond the scope of this analysis. Birth data, however, can better inform the debate over illegal immigration by providing insight into the number of children born to illegal alien mothers each year. (How one estimates births to illegals will be discussed at length in the next section.) The number of these children has direct bearing on what policy options we decide to pursue in dealing with this problem. A large number of children born to illegals may mean, for example, that a temporary worker program, like the one outlined by President Bush, is unrealistic. As U.S. citizens, all children born to guestworkers would have the right to stay permanently. Presumably most would return home if their parents did so, but some would be placed with relatives or even family friends in the reasonable belief that they would have better lives in America. As citizens this would be their right. But even assuming the parents return home and take their U.S.born children with them, these citizen children have the right to return to America at any time. A significant share can be expected to do so when they reach adulthood. Additionally, under current law, the citizenship of these children can be used to prevent their parent s deportation. This is because immigration judges can and do take into account the harm done to American citizens by a deportation. Thus, if many guestworkers or illegal aliens with U.S. citizen children decide to stay in America and fight deportation, their U.S. citizen children give them excellent grounds to do so. It must 3

4 also be remembered that once these children are adults they have the right as citizens to sponsor their parents for permanent residence without any numerical caps. All of these factors mean that a temporary worker program would result in tens of millions of permanent additions to the U.S. population, which is precisely what a temporary worker program is supposed to avoid. But without a careful analysis of birth data of the kind done here, one may not realize this. Data and Methodology Data. The data for this study come from birth certificates registered in all 50 states and the District of Columbia. The National Center for Health Statistics (NCHS), which compiles the data, reports that more than 99 percent of births occurring in this country are registered. 2 This means that births to illegal aliens are also included in this data. The 1990 and 2002 public use files used for this study include all births in the United States (over four million cases in 1990 and 2002) and are not samples. The 1980 public use file includes 100 percent data for all but seven states, which provided NCHS with 50 percent samples. 3 The 1970 data file is a 50 percent sample (1.9 million cases) from every state. All figures in this report are for births occurring within the 50 states and the District of Columbia. Information about the mother s current place of residence, race, age, and education level, as well as other information, are available in the public use file for mothers. In most, but not all, of its published reports the NCHS does not include births to mothers who indicated that they reside outside of the United States. In 2002, for example, there were 4,027,376 births in United States and all of these records are on the public use file used for this study. NCHS published reports generally show only 4,021,726 births for The 5,650 difference is births to women who report that they reside outside of the United States. While only a tiny fraction of all births, it seems incorrect to exclude these births, since all of these children are U.S. citizens. 4 In fact, in some cases the data show that the mother herself was born in the United States. Therefore, this report includes all births in the United States, including those to mothers who reside outside of the country. This means that state or county figures reported in this study on the place of residence of the mother will match published numbers form NCHS, but the national total for births in the United States are very slightly higher than in NCHS published figures because we include births to mothers who gave a foreign residence. Immigrant Mothers. All mothers are asked about their place of birth. This study focuses on the years 1970, 1980, 1990, and In each of those years, 99.8 percent of mothers indicated a place of birth. The 0.2 percent of the population that do not report place of birth of mothers will be counted with natives. Of foreignborn mothers in the public use file, only those born in Mexico, Canada, and Cuba are reported separately. Mothers born in other countries are simply designated as remainder of the world. We define foreignborn mothers as those born outside of the United States. Mothers born within the United States or in one of its outlying territories, such as Puerto Rico, are considered natives. In published reports, the NCHS counts individuals born in outlying territories as being foreign born. However, in my view it makes more sense to count these mothers as natives because they are all U.S. citizens, and were citizens from the day they were born. It should be noted that births to mothers from outlying U.S. territories comprise less than 1 percent of all births in the United States. Counting those born in outlying territories as natives is consistent with the Census Bureau definition of native/foreign born. 5 As already indicated, throughout this report we use the term immigrant and foreignborn synonymously when referring to mothers. What About Immigrant Fathers? The natality data used in this study do not include a question about the father s country of birth. However the Current Population Survey (CPS) collected by the Census Bureau does ask this question, though the sample size is relatively small and, unlike the natality data, there is some undercount in the CPS. The March 2002 CPS shows that for children born in the United States in the year prior to the survey, 84 percent who had a foreignborn mother also had a foreignborn father. Among Hispanic immigrants it was 88 percent. If adjusted for undercount, it seems likely that 86 percent of children born to immigrant mothers also have immigrant fathers. A similar percentage of children with an immigrant father have an immigrant mother in the CPS. Estimating Births to Illegal Aliens. As already indicated, more than 99 percent of births in the United States are recorded. Thus the birth data include births to those in the country illegally. To arrive at an estimate 4

5 of births to illegals, we estimate births per thousand for various demographic categories of immigrant women in their reproductive years. To do this we first generate a mid2002 estimate of the total foreignborn population so that the number of births relative to the size of the population can be calculated. 6 We then combine this estimate with the number of births from the NCHS data to get immigrant fertility rates by age, education level (for Mexicans), and region or country of origin. Dividing the number of births by the size of female foreignborn population in demographic category produces birth rates. Once we estimate birth rates by category, we then estimate the number of illegal alien women in each category. 7 To estimate the size of the female illegal alien population of reproductive age by category we rely on prior research and our own analysis. 8 We assume that illegal aliens have the same fertility as their legal counterparts. The available evidence indicates that the fertility of illegal aliens does not differ significantly from their legal counterparts with the same characteristics. 9 Our best estimates indicate that there were 383,000 births to illegal alien mothers in 2002, accounting for 42 percent of all births to immigrants and 9.5 percent of all births in the country. While this may seem like a surprisingly large share of births, it must be remembered that our own research, as well as work by the Urban Institute, Pew Hispanic Center, and the Census Bureau, indicates that more than onefourth of the nation s immigrant population is illegal. Moreover, because illegals come mainly to work, they are overwhelmingly in their primary reproductive years, comprising more than onethird of all immigrants age 18 to 39. Illegals tend to either gain legal status as they grow older or eventually return to their home countries. Therefore, the illegal population tends to be comprised of individuals in their 20s and 30s. In contrast, there are a larger number of older legal immigrants who have lived in the country for a long time and are over age 40. In addition, all prior research indicates that 80 percent or more of illegal immigrants are Hispanic, a group with relatively high fertility. For these reasons, illegal immigrants account for a much larger share of births than their share in the overall population or the immigrant population. Birth to Immigrants Nationally Number of Births to Immigrants. Figure 1 reports the number of births to foreign born mothers between 1970 and The figure shows dramatic growth in births to this population. The number of births to immigrants has grown from about 230,000 in 1970 to more than 900,000 in 2002, a 300percent increase. The dramatic growth in births to immigrant mothers is even more rapid than the very substantial growth in Figure 1. Number of Births to Immigrant Mothers Has Increased Dramatically Since ,000, , , , , , , , , , , , , , Source: analysis of public use natality files provided by the National Center for Health Statistics. 5

6 the overall immigrant population. Between 1970 and 2002, the number of immigrants in the United States increased from 9.6 million to 32.5 million a 237 percent increase. 10 While the overall growth in the immigrant population has been substantial, the growth in the number of immigrants was still less than the increase in births to immigrants. Share of Births to Immigrants. Figure 2 shows that as a share of all births in the United States, births to immigrants has increased dramatically in recent years. In 1970, 6.1 percent of births were to immigrant mothers; by 2002 it was 22.7 percent. The share of all births accounted for by immigrant mothers has increased 272 percent since To understand just how large the immigrant share has become, consider that the 22.7 percent of all births attributable to immigrants is more than 50 percent larger than the 14.7 percent of births that black mothers represent. Or put a different way, in 2002 there were more births to immigrants than all the births in 28 states plus the District of Columbia combined. Figure 2 also shows that over the last two decades the immigrant share of all births has increased much more rapidly than their share of the total population. As mentioned above immigrants increased their share of births by 272 percent, but as a share of the total population they increased 145 percent. As a result, the difference between their share of the total population and their share of births has increased significantly. In 1970 immigrants accounted for 4.7 percent of the total population and 6.1 percent of births a 1.4percentage point difference. But by 2002 they were 11.5 percent of total population and 22.7 percent of all births an 11.2 percentage point difference. What Explains the Rapid Rise in Immigrant Births? There are several factors contributing to the rise in the number of births to immigrants, and their share of all births. First and most obvious is simply the increase in the number of immigrants and their share of the overall population. But as we have seen, Figure 2 also shows that relative to their share of the total population, births to immigrants increased as well. The reason for this change is due to both the changing fertility rates and age structures of the immigrant and native populations. We examine those changes below by comparing Census Bureau population counts with birth records. 11 In 1970, the current wave of immigration had only just begun and a large share of immigrants were Figure 2. Births to Immigrant Mothers as a Share of All Births Has Increased Dramatically From 1970 to % 22.7% 20% 15% Immigrant Share of All Births Immigrant Share of Total Population 14.9% 11.5% 10% 9.4% 5% 6.1% 4.7% 6.2% 7.9% 0% Year Source: analysis of public use natality files provided by the National Center for Health Statistics. 6

7 longtime residents and, as a result, many were no longer in their primary reproductive years. The 1970 Census shows that only 36 percent of female immigrants were 15 to 44 years of age, much less than the 41 percent of natives. But the 1980 Census shows that 46 percent of female immigrants were 15 to 44 years of age, almost the same as the 45 percent of native born Americans in this age group. Fertility declined for both groups between 1970 and 1980, from roughly 119 births per thousand among immigrant women age 15 to 44 to 98 births per thousand, and from 87 births per thousand for native women in 1970 to 66 births. But fertility differences between the two groups remained constant at 32 births per thousand. Thus the primary reason immigrants increased their share of births relative to their share of the total population between 1970 and 1980 was an increase in the share of immigrants in their primary reproductive years. By 1990 things had changed significantly: While 45 percent of natives were still in their primary reproductive years, 53 percent of immigrants were in this age group. Moreover, immigrant fertility went up to 117 births per thousand for women 15 to 44, but remained relatively constant for natives at 67 per thousand. Thus the increase in the share of all births that immigrants accounted for between 1980 and 1990 was due to both an increase in immigrant fertility and an increase in the share of immigrants who were in their childbearing years. However, for the time period 1990 to 2002 the situation is somewhat different. Between 1990 and 2002 fertility for immigrants aged 15 to 44 actually fell from 117 births per thousand to 102 births. Fertility for natives also fell from 67 to 59 births per thousand. Thus the gap between immigrant and native fertility actually narrowed somewhat after However, the share of immigrants in their primary reproductive years continued to increase, from 53 percent in 1990 to 56 percent in 2002, while it fell for natives from 45 percent to 41 percent. Therefore, the increase in the immigrant share of births relative to their share of the total population between 1990 and 2002 was the result of a rise in the percentage who were in their primary reproductive years and not a widening gap between immigrant and native fertility. Overall, immigrants increased their share of births from 1970 to 2002 for three reasons: First, and most obvious is the dramatic increase in the overall size and share of the population that immigrants represent; second, the share of immigrants who are in their primary reproductive years increased relative to natives; third, the gap between immigrant and native fertility widened. Though this gap narrowed after 1990, it is still wider than it was in Historical Comparison. Figures 1 and 2 make clear that the number of births to immigrants and their share of all births represent a fundamental change from the recent past. But what of the last great wave of immigration? Many observers feel that the current situation is analogous to the early 20th Century, when immigrants represented a very large share of the total population. In 1910, immigrants reached 14.7 percent of the total population, after which time the number entering was significantly reduced by WWI and restrictive legislation in 1921 and Unfortunately, detailed administrative data on births going back to that time period does not exist. But the 1910 Census can be used to estimate the share of births that were to immigrants. Using the public use file of the 1910 Census, we estimate that 21.9 percent of all births were to immigrant mothers, somewhat less than today. 12 This estimate indicates that births to immigrants in 2002 likely accounted for a larger share than at any time in American history. In interpreting these numbers it is also important to realize that immigration was significantly reduced after But no such reduction seems to be in the offing today. Absent a change in immigration policy it is very likely births to immigrants will reach 30 percent of the total within a decade or so. Thus in a very real sense the present situation and the immediate future are without precedent in American history. As a nation we are headed into uncharted territory. Characteristics of Mothers The increase in births to immigrants described above provides only an overview of the numbers and percentages. In this section, we will examine the characteristics of immigrant mothers in order to better understand this social phenomenon. Educational Attainment of Mothers. The top portion of Table 1 shows the educational level of immigrant and native mothers. Unfortunately, a large number of states, including many of the biggest states, did not collect information on the education levels of new mothers in By 1980 most did ask the question, however several large immigrantreceiving states still did not. Therefore is not possible to examine education levels of new mothers for 1970 or 1980 at the national 7

8 level. (Later in this report, we will look at the education level of immigrant mothers for those states that collected this information in 1980.) Data for 1990 and 2002, however, show a very large gap in the education levels of immigrant and native mothers. In 1990, 44 percent of immigrant mothers lacked a high school education and 38.9 percent lacked one in In sharp contrast, only 20.2 percent of native mothers had not completed high school in 1990 versus 16.5 percent in While the share of each group that lacked a high school degree did decrease over this time period, the gap between the two groups narrowed very little and remained enormous 22.4 percentage points in Despite a modest decline in the share of immigrant mothers who lack a high school degree, the absolute number of births to immigrants without a high school degree increased by 83,000 between 1990 and This is possible because the number of births to immigrants increased so much that even though the percentage with little education decreased, the overall number actually increased. Between 1990 and 2002, the number of births to natives without high school degrees declined by 202,000. As a result, births to immigrants represent a growing percentage of births to lesseducated mothers. The 356,000 births to immigrant mothers without a high school degree accounted for 40.6 percent of all births to those without a high school degree in 2002, compared to 27.9 percent in The immigrant share of births to dropouts is striking especially compared to the 11.5 percent of the total population immigrants represent. Among more educated mothers, the gap seems to have actually grown somewhat wider between immigrants and natives. In 1990, 15.1 percent and 18 percent of births to immigrant and native mothers, respectively, were to those with at least a fouryear college degree, a 2.9percentage point difference. In 2002 that difference had widened to six percentage points, with 21.2 percent of immigrant mothers and 27.2 percent of native mothers having a bachelors degree. Thus, although there was an increase in the share of both immigrant and native mothers with a college degree, the percentage went up more for natives and as a result the difference between the two groups grew larger between 1990 and In general, the data do not show much convergence between the two groups at the top or bottom end of the education distribution. The education level of immigrant mothers has remained quite different from that of natives, and those differences have persisted for at least a decade. Importance of Education. The very large share of births to immigrants with little formal education has important implications for those children for two reasons: First, education is the single best predictor of income for overall socioeconomic standing. Given the education level of many immigrant mothers, it is certain that many of the children of immigrants are growing up quite poor, and this may have a longterm impact on these children. For example, 37 percent of young children in households headed by an immigrant with less than a high school education live in poverty and an additional 41 percent have low incomes (albeit above poverty). 13 What s more, it is well established that parental education, while not the only factor, is an important determinant of children s likely educational attainment. 14 With dropout rates for nativeborn Hispanics running about twice that of other natives, the large number of births to immigrants with little education may mean that this troubling trend will Table 1. Education and Age of Immigrant & Native Mothers, Education <HS HS Only Some College College + Age 19 and Under 20 to to and Over Immigrant Native Immigrant Native Immigrant Native Immigrant 7.1 % 62.4 % 28.0 % 2.4 % 18.3 % 64.8 % 15.5 % 1.4 % Source: analysis of public use natality files provided by the National Center for Health Statistics. 9.4 % 61.0 % 27.9 % 1.6 % 16.2 % 65.0 % 18.2 % 0.6 % 44.0 % 26.8 % 14.1 % 15.1 % 8.8 % 56.9 % 32.4 % 1.9 % 20.2 % 40.4 % 21.4 % 18.0 % 13.5 % 57.1 % 28.4 % 1.1 % 38.9 % 25.7 % 14.2 % 21.2 % 7.6 % 51.3 % 38.1 % 2.9 % Native 16.5 % 32.7 % 23.6 % 27.2 % 11.7 % 51.9 % 34.0 % 2.4 % 8

9 persist. 15 This has significant consequences for the prospects of these new secondgeneration Americans because education has become so important to economic success in the modern American economy. Of course, it is very difficult to predict how much education these children may ultimately receive. However, given the education levels of immigrant mothers, it is clear that a very large percentage of children in immigrant families are growing up in circumstances that are quite different from their nativeborn counterparts. Age of Mothers. The bottom of Table 1 reports the percentage of children born to immigrant and native mothers in their teens, twenties, thirties, and forties. In terms of the share of mothers in different age categories, there does not seem to be much meaningful difference between immigrant and native mothers. A slightly larger share of native mothers are teenagers than is the case among immigrant mothers. Of course, most immigrants come to America after age 19, thus there are relatively few teenage immigrants. Therefore it is not surprising that there are relatively few births to teenage immigrants. Nonetheless, the fact that only about 8 percent of births to immigrants are to teenagers is good news, and the overall decline in teenage births for both groups is clearly a positive social trend. Race and Ethnicity of Mothers. The top portion of Table 2 reports the race and ethnicity of new mothers. The 1970 data do not include information on whether the mother is Hispanic so the data is not directly comparable to other years. Not surprisingly, the figures show that immigrant and native mothers tend to be from different groups. This difference has become somewhat more pronounced over time. In 1980 almost 94 percent of native mothers were either nonhispanic black or white, compared to 37 percent of immigrant mothers. By 2002, only 22 percent of immigrant mothers were nonhispanic black or white, compared to 87 percent of native mothers. While the percentages have declined somewhat, native mothers remain overwhelming black or white, but those two groups make up only 22 percent of new immigrant mothers in In contrast, immigrant mothers tend to be overwhelmingly Asian or Hispanic. In 1980 almost 63 percent of immigrant mothers were from those two groups, compared to less than 6 percent of native mothers. By 2002, the Asian and Hispanic share of new mothers had risen to almost 78 percent among immigrants, but still only represented 12 percent of native mothers. The main change among immigrants over this time has been a decline in the share of births to nonhispanic whites and a rise in the share of mothers who are Hispanic. As already indicated, the public use file of birth records does not contain detailed information on the mother s country of birth. However, three countries are reported separately: Mexico, Cuba, and Canada. The bottom of Table 2 shows the share of immigrant mothers who are from those three countries. Mexico is by far the top country for immigrant mothers. This is not surprising, because Mexico is by far the top immigrantsending country, both for legal and illegal Table 2. Race/Ethnicity and Country of Origin for Immigrant & Native Mothers, Race/Ethnicity NonHispanic White NonHispanic Black NonHispanic Asian NonHispanic Other Hispanic Immigrant Native Immigrant Native Immigrant Native Immigrant 84.5 % 5.5 % 6.6 % 3.4 % 84.3 % 15.6 % 0.9 % 0.2 % 30.1 % 6.8 % 16.8 % 0.7 % 45.6 % 77.0 % 16.6 % 0.3 % 1.0 % 5.1 % 17.8 % 7.2 % 18.8 % 0.4 % 55.8 % 73.1 % 17.9 % 0.4 % 1.1 % 7.4 % 14.5 % 7.5 % 18.9 % 0.2 % 58.9 % Native 70.1 % 16.5 % 0.9 % 1.4 % 11.1 % Country Mexico Cuba Canada Balance of World 23.8 % 3.4 % 6.4 % 66.4 % 1 Data for Hispanics was not collected separatly in 1970, thus the race catagories are not directly compariable for that year to other years. 2 Persons of Hispanic origin can be of any race and are excluded from the other categories for 1980, 1990 and Source: analysis of public use natality files provided by the National Center for Health Statistics % 1.5 % 1.6 % 57.4 % 44.5 % 0.8 % 1.3 % 53.3 % 9

10 immigration. Putting aside figures for births, in 2002 nearly 30 percent of the total foreignborn population was from Mexico. Moreover, Mexican immigrants tend to be relatively young and in their primary reproductive years, and they tend to have the highest fertility of any major immigrant group. For these reasons, births to Mexican immigrants account for almost 45 percent of all births to immigrants in 2002, significantly higher than the 30 percent they represent of the total immigrant population. The Mexican share of births to immigrants has increased substantially: from 23.8 percent in 1970 to 35.9 percent in 1980, and 39.5 percent in 1990 to 44.5 percent in Throughout the time period examined in Table 2, although data for other Hispanics are limited in 1970, Mexicans have accounted for at least threefourths of births to Hispanic immigrants. 16 Given that more than 10 million Mexicanborn people now live in the United States, both legally and illegally, Mexico will continue to account for a very large share of births to immigrants for decades to come. Declining Diversity Among Immigrant Mothers. In one sense, today s immigration is more diverse than ever because people now arrive from every corner of the world. In another sense, however, the diversity of immigrants has declined significantly in the last two decades. As Table 2 shows, one country Mexico and one region Spanishspeaking Latin America have come to dominate U.S. immigration during the last two decades. Putting aside births, the decennial census as well as other Census Bureau data show that Mexico, the top sending country in 1980, increased its share of the total immigrant population from 16 percent in 1980, to 22 percent in 1990 and to 30 percent in The same data also show that Hispanic immigrants as a group increased their share of the total immigrant population from 30 percent in 1980 to nearly half of all immigrants by The birth data in Table 2 show an even more pronounced decline in diversity than in the overall immigrant population. Mexican mothers increased their share of births to immigrants from 35.9 percent to 44.5 percent between 1980 and Hispanic immigrants increased their share from 45.6 percent to 58.9 percent. The enormous growth in the number of births to immigrants from Mexico and the rest of Latin America means that the children of these immigrants will grow up in very different circumstances than children born to these groups a generation ago. For example, a child born to a Mexican immigrant mother in 1970 was entering a country where 1.5 percent of all children (including births to natives) had a Mexican immigrant mother. But that same child born in 2002 is growing up in a country where more than 400,000, or 10.1 percent, of all U.S.born children his age have a Mexican immigrant mother. A similar situation exists with Hispanic immigrants. In 1980, 150,000, or 4.1 percent, of all children were born to Hispanic immigrants, but by 2002, 540,000 children were born to Hispanic immigrants, and they comprised 13.4 percent of all U.S.born children. The opportunity to have continual contact with children from the same background is now dramatically greater than it was 20 or 30 years ago. It seems reasonable to assume that the declining diversity of immigrants must have some implications for American society. The most serious potential problem associated with declining diversity is that it may hinder the assimilation and integration of immigrants and their children. Much larger numbers may provide the critical mass necessary to create linguistic and spatial isolation. In contrast, a more diverse immigrant population may increase incentives to learn English or become familiar with American culture more generally. The English language and American culture are the means by which diverse groups communicate with each other and the larger society. But if one group dominates in an area, then this could fundamentally reduce the need to Americanize. No one country has ever accounted for such a large share of births to immigrants as do Mexican immigrants today. Our analysis shows that at the peak of immigration in 1910, the top country of immigrant births was the Russian Empire, which accounted for 18 percent of births to immigrants. Immigrants from Russia were extremely heterogeneous and included some ethnic Russians as well as Poles, Ukrainians, Jews, and immigrants from the Baltic states. Immigrants from Italy, a more homogenous group, accounted for slightly more than 16 percent of births to immigrant mothers. Moreover, immigrants from Russia and Italian immigrants each accounted for less than 4 percent of all births in America in In contrast, Mexican immigrants accounted for 10 percent of all births in The declining diversity of immigrants along with the rapid growth in the number of immigrants means that America is entering a new time, heretofore unknown in its history, when one group is dominant among immigrants decade after decade. This fact is reflected in the birth data. It is not at all clear what the outcome of this situation will be. 10

11 Education Level by Race and Ethnicity. Table 3 shows the education level of immigrant and native mothers by race and ethnicity. The table shows very large differences between groups in both 1990 and As already discussed, national data on the education level of mothers does not exist for 1980 because several large states did not collect that information then. In general, Hispanic immigrant mothers tend to have the lowest education levels, while those from Asia tend to have the highest. In 1990 there was a 43.1 percentagepoint difference between the share of Asian versus Hispanic immigrant mothers who lacked a high school education. By 2002, the difference was 48.8 percentage points. Although the share of each group that lacked a high school degree improved, Asian immigrant mothers improved more, and as a result the gap with Hispanics actually grew. A similar situation exists when comparing Hispanic immigrants to all natives. In 1990, 20.2 percent of all native mothers lacked a high school education compared to 64.2 percent of Hispanic immigrant mothers a 44 percentagepoint difference. In 2002, 16.5 percent of native mothers and 58.8 percent of Hispanic immigrant mothers lacked a high school education a 42.3percentage point difference. While the gap narrowed a little, the difference remained huge. In fact, the actual number of children born to lesseducated Hispanics actually increased because the overall Hispanic immigrant population grew so much. In 1990, 223,000 children were born to Hispanic immigrant mothers without a high school degree. In 2002 it was 317,000. At the top end, the difference between all natives and Hispanic immigrant mothers actually widened. In 1990, 18 percent of natives and 4.8 of Hispanic immigrant mothers had at least a fouryear college degree a 13.2 percentagepoint difference. By 2002, 27.2 percent of native and 6.7 of Hispanic immigrant mothers had a college degree a 20.5 percentagepoint difference. Although the share of both groups with a college degree increased, native mothers made much more substantial gains and the gap widened significantly. This is not the case for Asian immigrant mothers, a much larger share of whom had a college degree in 2002 than in As a result, the gap with natives in terms Table 3. Education by Race/Ethnicity for Immigrant & Native Mothers, 1990 & 2002 NonHispanic White NonHispanic Black NonHispanic Asian NonHispanic Other Hispanic 1 Total NonHispanic White NonHispanic Black NonHispanic Asian NonHispanic Other Hispanic 1 Total NonHispanic White NonHispanic Black NonHispanic Asian NonHispanic Other Hispanic 1 Total NonHispanic White NonHispanic Black NonHispanic Asian NonHispanic Other Hispanic 1 Total < HS 9.1 % 15.6 % 10.0 % 18.8 % 58.8 % 39.0 % 2002 Immigrants < HS 11.9 % 25.5 % 9.8 % 28.3 % 31.6 % 16.5 % < HS 12.8 % 21.6 % 21.1 % 20.3 % 64.2 % 44.3 % HS Only Natives 25.9 % 36.3 % 22.1 % 21.3 % 25.4 % 25.7 % HS Only 30.1 % 40.2 % 23.8 % 41.3 % 37.6 % 32.7 % 1990 Immigrants < HS 15.3 % 30.6 % 8.9 % 33.8 % 40.0 % 20.2 % HS Only 34.7 % 39.3 % 27.9 % 28.3 % 22.3 % 26.7 % Natives HS Only 39.7 % 43.7 % 28.7 % 44.6 % 39.1 % 40.4 % Some College 21.9 % 24.2 % 20.1 % 19.8 % 9.0 % 14.2 % Some College 24.3 % 23.1 % 22.3 % 21.8 % 20.2 % 23.6 % Some College 22.9 % 22.3 % 19.1 % 20.3 % 8.7 % 14.1 % Some College 22.8 % 19.0 % 23.6 % 17.3 % 15.2 % 21.5 % College % 23.9 % 47.8 % 40.1 % 6.7 % 21.2 % College % 11.2 % 44.0 % 8.6 % 10.6 % 27.2 % College % 16.8 % 31.9 % 31.2 % 4.8 % 15.0 % College % 6.6 % 38.7 % 4.3 % 5.6 % 18.0 % 1 Persons of Hispanic origin can be of any race and are excluded from the other categories. Source: analysis of public use natality files provided by the National Center for Health Statistics. 11

12 of college graduates actually become more pronounced in favor of Asian immigrants between 1990 and Table 3 shows that some of the largest gains in terms of education among immigrant mothers were among black immigrants. Over this time period, the share lacking a high school degree declined significantly, and the share with a college degree increased a good deal. Although we cannot say for sure from this data, the increasing education of black immigrant mothers may reflect the increasing share of black immigrants who are skilled professionals from Africa. In contrast, earlier waves of black immigration were almost entirely Caribbean. Table 3 makes clear that there is great diversity in the educational level of immigrant mothers. Immigrant mothers from some parts of the world are more educated than natives while other groups are much less educated than natives. But overall, immigrant mothers in 2002 were much less educated than natives, and the difference between the two groups has narrowed little or not at all in the last decade. American citizens (native born or naturalized) is trivial because American citizens can sponsor their spouses for green cards without numerical limits. But not all illegal alien mothers are married. In addition, some of the fathers of these children might be Lawful Permanent Residents (LPRs). In some cases, the spouses of LPRs must wait to receive a green card because of numerical limits. Of course, this situation would only arise if someone married an illegal alien after he had received LPR status but before he became a citizen, which he can do after being in the country for five years. Otherwise, when the immigrant received LPR status he would have been able to bring his spouse with him as part of the normal legal immigration system. It seems likely that perhaps 5 to 10 percent of children born to illegal mothers have a legal father, but it is not easy to say for sure. Of course, a similar situation must exist among illegal alien fathers who have a child with a woman who is in the country legally. Birth data, however, do not indicate if the father is foreign born. Births to Illegal Aliens. As indicated in the methodology section, we estimate that there were 383,000 births to illegal alien mothers in 2002, accounting for 41.9 percent of births to immigrants. Figure 3 shows the region or country of birth for illegal alien mothers in The vast majority of illegal mothers were from Mexico or elsewhere in Latin America. One question the data do not answer is what share of the fathers were legal residents. We can say that the number of illegal alien women married to Figure 3. Births to IllegalAlien Mothers by Region, 2002 NonMexican Latin America 18.1% Alll Others 12.1% Mexican Immigrants 69.8% Source: analysis of public use natality files provided by the National Center for Health Statistics. 12 Significance of Births to Illegals. The large number of children now being born to illegal aliens each year is important for a number of reasons. First, it makes clear the enormous scale of illegal immigration. Consider that in recent years between 400,000 and 600,000 legal immigrants chose each year to become American citizens; in 2004 it was 536,174. In comparison, births to illegal immigrants are adding nearly 400,000 citizens. It is not inconceivable that if illegal immigration is allowed to continue, there may come a time in the not too distant future when births to illegal immigrants will actually add more citizens to the United States each year than naturalizations of legal immigrants. Second, because all of these children are American citizens, there is a permanence to the illegal alien problem. As U.S. citizens, these children have a right to stay permanently, their citizenship can prevent a parent s deportation, and once adults they can sponsor their parents for green cards. Thus even if all illegals were to go home, the consequences of tolerating illegal immigration are very longterm. Third, births to illegals remind us that illegal aliens are not simply workers or mere factors of production, which is how so many in

13 the business community tend to see them. They are human beings, who have children and thus impact our society in a host of ways. We estimate that twothirds of illegal alien mothers lack a high school degree. Clearly many of the children of illegal aliens will grow up in circumstances very different from those of children of natives, even if their parents are given legal status. Thinking about illegal immigration simply as a source of cheap labor misses the enormous longterm challenges it creates for the country as we attempt to improve the lives of millions of children born to illegal alien parents who have little education. An additional effect of illegal immigration is the cost to taxpayers. As American citizens, the children of illegal aliens are eligible for all social services provided by federal, state, and local government. But even putting the long term costs aside, the fiscal impact of just paying for the births to illegal aliens is huge. We estimated that the cost to taxpayers of paying for just the births to uninsured illegal alien mothers was $1.7 billion in State and Local Data Number of Births to Immigrants by State. Table 4 (page 19) shows the number of immigrant and native births by state for 1970, 1980, 1990, and With almost no exceptions, births to immigrants increased in every state in the last three decades. In many states the growth can only be described as phenomenal. Nevada, Georgia, and North Carolina saw the most dramatic increases between 1970 and In Nevada the number increased 19 times, in Georgia the number increased 18 times and in North Carolina the increase was nearly 16 times. Putting aside Nevada, which was a very small state in 1970, since 1980 the number of births to immigrants has increased 11 times in Georgia almost 10 times in North Carolina. In total, 21 states saw at least a fivefold increase in births to immigrant mothers since In 22 other states the number more than doubled. Even just the period from 1980 to 2002 shows spectacular growth. In total, seven states saw at least a fivefold increase in births to immigrant mothers between 1980 and In six other states the number grew more than fourfold, in 11 additional states the number tripled, and in another 18 states it more than doubled. Of course, in many states the number of native births also increased significantly as the states overall populations grew. But even so, immigrants still have increased their share of births dramatically. Percentage of Births to Immigrants by State. Table 5 (page 20) reports the percentage of all births by state that were to immigrant mothers in 1970, 1980, 1990, and Between 1970 and 2002, there were three states North Carolina, Georgia, and Arkansas where immigrants increased their share of births at least 10 fold. In 12 other states, immigrants increased their share of births at least fivefold and in 21 states plus the District of Columbia the share tripled. In Georgia, the immigrant share of births increased sevenfold, from 2.7 percent in 1980 to 19.1 percent in In North Carolina, the increase was more than six times, increasing from 2.6 percent to almost 16.7 percent between 1980 and There were a total of eight states in which the immigrant share of births increased at least fourfold and 11 states where it tripled after There were also 18 states and the District of Columbia where the share of births to immigrants more than doubled. Even in states where a large percentage of births were already to immigrant mothers in 1980, immigrants still increased their share of births. In New York state, immigrants increased their share of births from 17.8 percent to slightly over 34 percent. And in California the immigrant share increased from 27.2 percent to 46.2 percent between 1980 and Tables 4 and 5 clearly show that the spectacular growth in births to immigrants has not been confined to a few states; it is a national phenomenon. The last column in Table 5 reports the share of each state s total population that was foreign born in The figures for the total foreign born come from the March 2002 and 2003 Current Population Surveys (CPS) collected by the Census Bureau. Because the data for the total foreign born is based on a survey, we have averaged two years together to get a more accurate picture of the foreign born share in smaller states. Comparing the immigrant share of the total state population with the immigrant share of births produces some very interesting results for a number of states. Nationally, immigrants were 11.5 percent of the total population (11.6 percent when 2002 and 2003 data are averaged as in Table 5) and 22.7 percent of births were to immigrants in This is roughly a twotoone ratio of births to immigrants. But, in some states the ratio is much larger. In Georgia and North Carolina, for example, the ratio of births to immigrants relative to their share of the total population is more than three to one. There are several possible explanations for this situation. The large number of births to immigrants in these states may mean that the undercount of the foreign born in the census is quite 13